1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf8449d05bd040a62d00a88ece5697f0d44079541b1bae75b538cb731c2951f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8460fab4-0f07-4e20-954b-cedb9516005b.json and https://artists.proofprofile.net/proofs/artist/8460fab4-0f07-4e20-954b-cedb9516005b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7b9debd93583c0e86978f27f2f1b0c4acb872be1c71a9a88e8b44ff2d21f93. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:06:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKJ8H2005445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a027e32fd9380bd3f02961626ec33643a25577a2e953e273786a809846f9d6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKJ8H2213717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d0944f1c87f02861be0939167e83e4d0b55426e53d81e13dba06a1c226ecbd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX452354122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674c9d3c700f00d1fc93c7616f7ce8a750ba5598fcd14711dc1c52fecf7f5b03. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKJ8H2303348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb678d16189361cc0e59a305718c7229f1971b02674ca86919c8d2e0bd6eec169. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:22:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUBEC2342130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f027e655e334ff4b2d1d7ece702a860e96142f749c2d12770014036014c0bf. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA0P2304074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b8cd0fcc7dcb76d7f0d80fbb55b47561a52c5cbb1b952a913a081146924896. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S2441580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e89ab94cdbc58cbd9e3b4707fff485317a98779026f487bdc81e4076a409ce. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202414032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf70a61579296471a1f3838c82d4e1fe866845d5285c2ae6a97a0c6b4576a14. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX282427333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b1a595550e26d832aba6ca267e26446c03a1cc0fde34030851381339288e02. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA092416020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe7cb66d367321c3f0bdfa9d3d0189a452984e5e013ba13300c5bc586da63b9. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:57:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA0Q2441140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64f8b77b3211a363256d167253432fc0ff04455d72cca27275de664d4036821. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:37:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA0S2429408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dee8203903fa8ee501f2f3089bb1d6aa618b5b869d869d46f479efd5ea8dbf. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:06:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR59R2504374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8110eabe497d0f0608a6ba89c19b87fa09c457d03d6e6c7f48e49c61637f0a6. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:23:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX452552796.